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EXISTING SYSTEM

PROPOSED SYSTEM

EXISTING  CONCEPT:

        In the existing system it is focused on received power and path loss, as well as the effects of opening/closing doors. This study measured the received power, power delay profile, and RMS delay spread of a wireless channel over multiple decks of a merchant ship. This measurements  were used to estimate coherence  bandwidth and delay spread, which can be used to calculate the maximum rate at which narrow band communication techniques can transmit data without experiencing inter-symbol interference (ISI). Received power estimates were also used to evaluate the impact of deploying a wireless relay in a lift shaft aboard the ship.

PROPOSED CONCEPT:

·         The proposed system uses Orthogonal Frequency-Division Multiplexing (OFDM) which is suitable for this type of environment as a means to mitigate frequency selectivity that may reduce the role of coherence bandwidth as a limiting factor in wireless communications throughput. Multiple-input–multiple-output (MIMO) communications and multiple antenna techniques can also improve radio performance by exploiting spatially uncorrelated fading of wireless channels common in multipath-rich environments to improve throughput and reliability.

EXISTING TECHNIQUE :

      Narrow band communication technique.

PROPOSED TECHNIQUE:

         OFDM and multi-antenna techniques is used.

TECHNIQUE DEFINITION:

         Narrow band communication technique is used which can transmit data without experiencing inter-symbol interference (ISI).

TECHNIQUE DEFINITION:

         MIMO communication and multiple antenna techniques can also improve radio performance by exploiting spatially uncorrelated fading of wireless channels.

DRAWBACKS:

        Desired throughput is  not achieved

        Decreases the network performance.

       Shannon channel capacity is not measured.

ADVANTAGES:

           Desired throughput is achieved

          Improves network performance.